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E-mail: jimankim@skku.eduReceived July 15, 2008In the present work, Diels-Alder reaction of cyclopentadiene with ethylacrylate has been carried out by usingtwo types of mesoporous solid acid catalysts (Al-MCM-41, Al-MCM-48) with different pore structures. Thespecific topology of Al-MCM-48 (cubic Ia3d structure composed of two independent 3-D channel systems)exhibit higher activity and stereo-control than those of Al-MCM-41 (hexagonal packing of 1-D channels). Thephysical properties of Al-MCM-48 catalyst, such as high accessibility of reactants to the acid sites, spatialconfinement in the nanoscopic reactors, and 3-D channel network structure that are effective adsorption anddiffusion of reactants, play a crucial role in the present study.Key Words : Mesoporous catalyst, Al-MCM-48, Diels-Alder reaction, Cyclopentadiene, Ethylacrylate IntroductionDiels-Alder (DA) reactions have attracted much attentionas a powerful synthesis pathway and widely utilized insynthetic organic chemistry and in the chemical industry,due to the high degree of regio- and stereo-selectivity.

Diels-Alder Cycloaddition of Cyclopentadiene with Ethylacrylate Catalyzed by Mesoporous Al-MCM-48 and Al-MCM-41 Catalysts